Improvement in stove-pipe dampers



De W. 0. BREED.

STOVE-PIPE DAMPER.

No.184,75Z. Patented Nov.28,187 6 WWW/,4 7 Maw; 1 mama,

.NI'IED STATES PATENT QFFIGE.

DE WITT O. BREED, OF BUFFALO, NEW YORK.

IMPROVEMENT IN STOVE-PIPE DAMPERS.

Specification forming part of Letters Patent No. 1 84,752, datedNovember 28, 1876; application filed March 1, 1876.

To all whom it may concern Be it known that I, DE WITT CLINTON BREED, ofBuffalo, in the county of Erie and State of New York, have made certainImprovements in Stove-Pipe Dampers, of which the following is aspecification:

This invention relates to an automaticallyacting damper placed in thevertical pipe of a stove and acted on by a-pneumatic valve; and theinvention consists in the construction and arrangement of parts, asfully hereinafter described and claimed.

In the drawings, Figure l is a sectional side elevation of a section ofstove-pipe with my improved damper therein. Fig. 2 is a front elevation,and Fig. 3 a plan.

A is the pipe,.and B the damper, which is the usual circular disk made alittle smaller in diameter than the pipe. This damper is hinged ata, toa bent wire spring or ring, I), which is held in place in the pipe bybeing forced in from one end until it springs into the usual cavityformed by the molding or rib 0 upon the pipe, by which means it iseasily but securely held in place without the necessity of cuttingthrough the side of the pipe. 0 is a door or leaf, which is hinged atthe top and swings inwardly, and is so made that it will, when closed,completely cover the open ing in the front of the pipe. To the center ofthis door is secured a disk or plate, D, having its edges turnedoutward, and provided with notches d d at intervals. 6 is a wire or rod,which passes through the center of the disk D, and is turned into acrank atf, on the inside of the pipe, back of the door (3, as shown.This crank is connected by another wire, g, loosely, to the damper, backof the center hinge a, so that when the knob h is turned the damper maybe opened or closed. The shank of the knob h will act as a spring inconnection with the plate, and will catch into the notches d and holdthe damper in any position desired.

The object of the door G is this: If the damper is Wide open, which willbe the case when the knob is at its highest point, the door G, by beingpressed in, will of course elevate the end of the crankf, and by thatmeans raise the connectingwire g and close the damper. If the door isforced in as far as it will go the damper will be entirely closed, andthus shut off the draft from the fire; or, if only partially opened, thedamper will be only partially closed, this being regulated by thedistance which the door is moved. By this arrangement the action of theoutside air pressing upon the door 0 will regulate the position oraction of the damper B, and thus act as a governor or regulator to thefire and reduce the consumption of fuel. It will be seen that it isself-acting, only requiring to be set on occasions when the draftthrough the chimney and pipe is regular, and it is regulated accordingto the force of the draft. there is a disturbance in the current of airin the chimney the valve operates so that it is closed and the draft isequalized. On the cessation of the disturbing elements the governoropens the valve.

I claim- 1. In combination with pipe A, the diskdamper B, hinged to thewire frame a b, and operating the draft-door G by the connectingrods g ef, substantially as specified.

2. The automatically-acting door 0, hinged directly in the pipe A, andin combination with the damper B, substantially as and for the purposespecified.

In witness whereof I have hereunto signed my name in the presence of twosubscribing witnesses.

DE WITT O. BREED.

Witnesses:

' J. R. DRAKE,

W. M. HAWKINS.

When

